If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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If the 7^{th} term of a H.P. is 1/10 and the 12^{th} term is 1/25, then the 20^{th} term is
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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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The first and last term of an A.P. is a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by \(\frac{{{l^2}  {a^2}}}{{k  \left( {l + a} \right)}}\) then k = ?
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If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms is 273, then the third term is :
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The common difference of the A.P. \(\frac{1}{{2b}} \frac{{1  6b}}{{2b}} \frac{{1  12b}}{{2b}}\) . . . . . is
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In an A.P., if d = 4, n = 7, a_{n} = 4, then a is
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If log 2, log (2^{x} 1) and log (2^{x} + 3) are in A.P, then x is equal to ___
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If the fifth term of a GP is 81 and first term is 16, what will be the 4th term of the GP?
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Let S denotes the sum of n terms of an A.P. whose first term is a. If the common difference d is given by d = S_{n} – k S_{n1} + S_{n2} then k =
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What is the sum of the first 17 terms of an arithmetic progression if the first term is 20 and last term is 28?
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